Waves

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Waves

So waves are everywhere. But what makes a wave a wave? What

characteristics, properties, or behaviors are shared by all the

phenomenon which we typically characterize as being a wave? How can

waves be described in a manner that allows us to understand their

basic nature and qualities?

A wave can be described as a disturbance that travels through a medium

from one location to another location. Consider a slinky wave as an

example of a wave. When the slinky is stretched from end to end and is

held at rest, it assumes a natural position known as the equilibrium

or rest position. The coils of the slinky naturally assume this

position, spaced equally far apart. To introduce a wave into the

slinky, the first particle is displaced or moved from its equilibrium

or rest position. The particle might be moved upwards or downwards,

forwards or backwards; but once moved, it is returned to its original

equilibrium or rest position. The act of moving the first coil of the

slinky in a given direction and then returning it to its equilibrium

position creates a disturbance in the slinky. We can then observe this

disturbance moving through the slinky from one end to the other. If

the first coil of the slinky is given a single back-and-forth

vibration, then we call the observed motion of the disturbance through

the slinky a slinky pulse. A pulse is a single disturbance moving

through a medium from one location to another location. However, if

the first coil of the slinky is continuously and periodically vibrated

in a back-and-forth manner, we would observe a repeating disturbance

moving within the slinky which endures over some prolonged peri...

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...In a water wave, energy is transported without the transport of water.

The same thing can be said about a stadium wave. In a stadium wave,

the fans do not get out of their seats and walk around the stadium. We

all recognize that it would be ludicrous for any fan to even

contemplate such a thought. In a stadium wave, each fan rises up and

returns to the original seat. The disturbance moves through the

stadium, yet the fans are not transported. Waves involve the transport

of energy without the transport of matter.

In conclusion, a wave can be described as a disturbance which travels

through a medium, transporting energy from one location (its source)

to another location without transporting matter. Each individual

particle of the medium is temporarily displaced and then returns to

its original equilibrium positioned.

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